Means for propelling boats.



I s. GIOVANNINI. MEANS FOR PROPELLING BOATS.

APPLICATION FILED JUNE 12, 1909.

Patented May 10, 1910.

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S. GIOVANNINI.

MEANS FOR PROPELLING BOATS. APPLICATION FILED JUNE 12. 1909 ANDREW s.GRAHAM co. PHOT0 L1TNDGRAPHER5, WASNINGYDN. 0.0.

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S. GIOVANNINI.

MEANS FOR PROPELLING BOATS.

APPLICATION FILED JUNE 12, 1909.

Patented May 10, 1910.

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SEBASTIANO GIOVANNINI, OF CHICAGO, ILLINOIS.

MEANS FOR PROPELLING BOATS.

Application filed June 12, 1909.

Specification of Letters Patent.

Patented May 19, 1919. Serial No. 501,782.

T 0 all whom it may concern:

Be it known that I, SEBASTIANO GIOVAN- NINI, a subject of the King ofItaly, residing at Chicago, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Means for PropellingBoats, of which the following is a specifica tion.

My invention relates to improved means for propelling boats and has forits objects the production of simple means for this purpose which mayalso be utilized for the steering of the boat.

In the drawings Figure 1 is a longitudinal section through apparatusembodying my invention; Fig. 2 is a horizontal section of Fig. 1; Fig. 3is an enlarged section on line XX of Fig. 2; Fig. 4 is an enlargedsection on line Y-Y of Fig. 2; Fig. 5 is an enlarged section on line Z-Zof Fig. 2; and Fig. 6 is a top plan view of the apparatus on a reducedscale and indicating in dotted lines its position relatively to a boat.

Upon the bottom 1 of the boat or ship is pivoted a vertical pipe 2provided with a substantially horizontal discharge pipe 3 located underthe bottom of the boat. The

, pipe 2 is preferably provided with a gate 4 by means of which it maybe closed, and communicates at its upper end with a substantiallyhorizontal pipe 5 leading by way of a reduced pipe 6 and tortuous pipes7 to an S-shaped compartment 9. A. pipe 10 leads from compartment 9 to apipe 11 which leads to a head 12 which is pivoted to a pedestal 13 bymeans of a pivot pin 14, whose axis is in alinement with the axis ofpipe 2. Head 12 is also pivoted in the same axis with the head 15 fromwhich leads a pipe 16 to the pipe 17, communicating with the water underthe bottom of the boat. A gate or valve 18 is preferably provided forclosing the pipe 17 when desired and pipes 3, 2, 5, 10 and 11 and head12 are all rigidly connected together.

Two substantially horizontal shafts 19 and 20 are mounted in suitablebearings in the pipes 5 and 6 and compartment 9. Shafts 19 and 20 carrythe opposite and intermeshing screw threads 21 and 22 in compartment 9,which is made fi-shaped to closely fit the outside surface of saidscrews. Shafts 19 and 20 extend through the wall of ipe 10 where theyare provided with end thrust plates 23 and 24 resting against anabutment 2.). Ball bearings 26 are provided between plates 23 and 24 andabutment Abutment 25 rests against the in ner side of an annular ring27, suitably supported by posts 28 from the bottom of the boat. The ring27 carries an annular gear 29 loosely resting in an annular groove inthe ring 27 Abutment 25 is attached to the gear 29 by means of an arm orsupport 30. A gear 31 meshes with the gear 29 and is adapted to rotatesaid gear 29 in its annular groove. The gear 31 is mounted on a shaft 32carrying a bevel gear 33 meshing with a bevel gear 34 on the shaft 35,which is placed under the control of the pilot of the boat by anysuitable means (not shown). The other ends of shafts 19 and 20 extendthrough the wall of pipe 5, where they are provided with intermeshinggears 36 and 37. Shaft 20 carries a bevel gear 38 meshing with a doublebevel gear 39 loosely mounted around pipe 2. Gear 39 also meshes with abevel gear 40 on a shaft 41 which is driven by the engine of the boatthrough the medium of pulley 42.

By this construction it will be seen that when the shafts 19 and 20 arerotated in the direction indicated by the arrows, a quantity of waterwill be imprisoned between the screw threads 21 and 22 and the walls ofthe jacket of compartment 9 and forcibly driven therethrough in thedirection of the arrows in Fig. 1. It will be observed that thisfurnishes a positive and powerful means for forcing a continuous andconstant stream of water through pipes 6, 7, 5, 2 and 3, thus avoidingthe throb or pulsation of an intermittent stream. This will produce anunopposed reaction at the mouth of passage pipe 3, thus propelling theboat in the direc tion of the pivotal pipes. By means of gears 31 and29, the pivotal pipes may be shifted to any desired position while inoperation as indicated in dotted lines in Fig. 6, and thus the directionof the boat controlled. If the pivotal pipes are shifted to .a positionmore than 90 degrees from that illustrated in Figs. 1 and 2, the boatmay be backed and also steered in any desired direction.

While I have illustrated and described the preferred construction forcarrying my invention into effect, this is capable of variation andmodification without departing from the spirit of the invention. Andtherefore I do not wish to be limited to the exact construction setforth but wish to avail myself of such variations and modifications ascome within the scope of the appended claim.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

In means for propelling boats, the com bination of a stationary tubecommunicating with the water on the exterior of the vessel andterminating in a vertically disposed head; a vertically disposed headco1n1nuni-' eating with and pivoted to-said first mentioned head; a pipeleading outwardly from the axis of said pivoted head and communicatingwith an inwardly extending pipe,

which latter communicates with a vertical pipe pivoted in the axis ofthe two first mentioned heads and having a substantially horizontaldischarge beneath the bottom of the boat; means for forcing waterthrough said pipes; and means for swinging the pivoted pipes todifferent positions substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SEBASTIANO GIOVANNINI. lVitnesses :HELiEN F. LrLLIs JOSHUA R. H. Porrs.

